/*
* Boo Development Tools for the Eclipse IDE
* Copyright (C) 2005 Rodrigo B. de Oliveira (rbo@acm.org)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package monolipse.ui.editors;
import java.util.*;
import org.eclipse.jface.text.TextAttribute;
import org.eclipse.jface.text.rules.*;
import org.eclipse.jface.text.source.ISharedTextColors;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.RGB;
public class BooScanner extends RuleBasedScanner {
static final String[] MEMBERS = new String[] {
"class",
"struct",
"def",
"constructor",
"destructor",
"event",
"enum",
"as",
"interface",
"get",
"set",
"private",
"public",
"protected",
"internal",
"of",
};
static final String[] MODIFIERS = new String[] {
"override",
"static",
"virtual",
"abstract",
"final",
"transient",
"partial",
};
static final String[] NAMESPACE = new String[] {
"from",
"import",
"namespace",
};
static final String[] OPERATORS = new String[] {
"is",
"isa",
"and",
"or",
"not",
};
static final String[] KEYWORDS = new String[] {
"ast",
"break",
"callable",
"cast",
"continue",
"do",
"else",
"elif",
"except",
"failure",
"ensure",
"for",
"in",
"if",
"goto",
"pass",
"raise",
"return",
"yield",
"typeof",
"try",
"unless",
"while",
};
static final String[] PRIMITIVES = new String[] {
"bool", "byte", "sbyte", "char",
"short", "ushort",
"int", "uint",
"long", "ulong",
"string", "object", "duck",
"single", "double",
"void",
"regex", "timespan", "date"
};
static final String[] BUILTINS = new String[] {
"assert",
"getter",
"property",
"required",
"using",
"lock",
"len",
"array",
"matrix",
"print",
"macro",
"match",
"case",
"otherwise",
};
static final String[] LITERALS = new String[] {
"null",
"true",
"false",
"self",
"super",
};
static class BooWordRule implements IRule {
private Map<String, IToken> _words = new HashMap<String, IToken>();
private StringBuffer _buffer = new StringBuffer();
private IToken _identifier;
private IToken _invocationTarget;
public BooWordRule(ISharedTextColors manager, Color backgroundColor) {
IToken identifierToken = createToken(manager, BooColorConstants.DEFAULT, backgroundColor);
IToken keywordToken = createBoldToken(manager, BooColorConstants.KEYWORD, backgroundColor);
IToken primitiveToken = createBoldToken(manager, BooColorConstants.PRIMITIVE, backgroundColor);
IToken invocationTarget = createToken(manager, BooColorConstants.INVOCATION, backgroundColor);
IToken memberToken = createBoldToken(manager, BooColorConstants.MEMBER, backgroundColor);
IToken modifierToken = createToken(manager, BooColorConstants.MODIFIER, backgroundColor);
IToken builtinToken = createBoldToken(manager, BooColorConstants.BUILTIN, backgroundColor);
IToken literalsToken = createBoldToken(manager, BooColorConstants.LITERAL, backgroundColor);
IToken namespaceToken = createBoldToken(manager, BooColorConstants.NAMESPACE, backgroundColor);
IToken operatorsToken = createBoldToken(manager, BooColorConstants.OPERATORS, backgroundColor);
_identifier = identifierToken;
_invocationTarget = invocationTarget;
addWords(KEYWORDS, keywordToken);
addWords(MEMBERS, memberToken);
addWords(MODIFIERS, modifierToken);
addWords(PRIMITIVES, primitiveToken);
addWords(BUILTINS, builtinToken);
addWords(LITERALS, literalsToken);
addWords(NAMESPACE, namespaceToken);
addWords(OPERATORS, operatorsToken);
}
private Token createBoldToken(ISharedTextColors manager, RGB rgb, Color backgroundColor) {
return new Token(
new TextAttribute(
manager.getColor(rgb),
backgroundColor,
SWT.BOLD));
}
private Token createToken(ISharedTextColors manager, RGB rgb, Color backgroundColor) {
return new Token(
new TextAttribute(manager.getColor(rgb), backgroundColor, SWT.NORMAL));
}
private boolean isWordStart(char c) {
return Character.isJavaIdentifierStart(c);
}
private boolean isWordPart(char c) {
return Character.isJavaIdentifierPart(c);
}
public IToken evaluate(ICharacterScanner scanner) {
int c = scanner.read();
if (isWordStart((char) c)) {
_buffer.setLength(0);
do {
_buffer.append((char) c);
c = scanner.read();
} while (c != ICharacterScanner.EOF && isWordPart((char) c));
scanner.unread();
IToken token = _words.get(_buffer.toString());
if (token != null && !followsADot(scanner, _buffer.length()))
return token;
return '(' == peekNextValidChar(scanner) ? _invocationTarget : _identifier;
}
scanner.unread();
return Token.UNDEFINED;
}
private boolean followsADot(ICharacterScanner scanner, int length) {
return '.' == peekPreviousValidChar(scanner, length);
}
private int peekPreviousValidChar(ICharacterScanner scanner, int length) {
unreadMany(scanner, length);
int unreadCount = 0;
int c = peekPrevious(scanner);
while (c != ICharacterScanner.EOF && Character.isWhitespace((char)c)) {
scanner.unread();
c = peekPrevious(scanner);
++unreadCount;
}
skip(scanner, unreadCount + length);
return c;
}
private int peekPrevious(ICharacterScanner scanner) {
scanner.unread();
return scanner.read();
}
private void skip(ICharacterScanner scanner, final int skipCount) {
for (int i=0; i<skipCount; ++i)
scanner.read();
}
private int peekNextValidChar(ICharacterScanner scanner) {
int readCount = 1;
int c = scanner.read();
while (c != ICharacterScanner.EOF && Character.isWhitespace((char)c)) {
c = scanner.read();
++readCount;
}
unreadMany(scanner, readCount);
return c;
}
private void unreadMany(ICharacterScanner scanner, int count) {
while (count > 0) {
scanner.unread();
--count;
}
}
private void addWords(String[] words, IToken token) {
for (int i=0; i<words.length; ++i) {
_words.put(words[i], token);
}
}
}
public BooScanner(ISharedTextColors manager) {
this(manager, null);
}
public BooScanner(ISharedTextColors manager, Color backgroundColor) {
IToken defaultToken =
new Token(
new TextAttribute(
manager.getColor(BooColorConstants.DEFAULT),
backgroundColor,
SWT.NORMAL));
IToken numberToken =
new Token(
new TextAttribute(
manager.getColor(BooColorConstants.NUMBER),
backgroundColor,
SWT.NORMAL));
IToken whitespace = backgroundColor == null
? Token.WHITESPACE
: new Token(new TextAttribute(null, backgroundColor, SWT.NORMAL));
IRule[] rules = new IRule[] {
new BooWhitespaceRule(new BooWhitespaceDetector(), whitespace),
new NumberRule(numberToken),
new BooWordRule(manager, backgroundColor),
};
setRules(rules);
setDefaultReturnToken(defaultToken);
}
}